Improved method of heating tan-bark leaches by steam



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LEWIS C. ENGLAND, on PHILADELPH'IA, PENNSYLVANIA.

Letters .Patent No. 95,009, dated September 21, 1869. d

IMPROVED`METHQD 0F HEATING TAN-BARR. LEACHES BYSTEAM.

The Schedule x'eterred to in these Letters Patent and m'akng part of the same.

`To' all 'whom it may concern.'

Be it known that 1,'LE'w1s C. ENGLANmof the cit-y and 'county of Philadelphia, and State of Pennsylvania, have invented a new and improved Method of Heating Tau-Bark Liquors by Steam; and I do hereby declare that the following is a full, clear, and

exact description of' the same, reference being had to `the accompanying drawings, and' to the let-ters of refereuce marked thereon, in 'which- Figure l is a plan view of two leach-vats, L1, with false bottomremoved, L,leachvat with false bottom in place.

. Figure 2 is a cross-section.

The nature of my invention consists in an improved method of heating by `steam tan-bark leaches and,

,ing concentrated, for which purpose, mainly, the heating is done. One important endeavor of tanners, and

also `ot' manufacturers of concentrated extract of bark, is to makethe liquors as strong as possible be-k fore it is drawn oit' from the bark; therefore, it is important that the bark-liquors should be, heated without allowing the heating steam to be discharged into the .stronger liquors, by furnishing my leaches, and also my junk, with coils orstrands of suitable steampipe, and the steam passingr through a sufficient length of` pipe, it is then discharged, ina partially condensed form, into another and larger pipe or hollow log, placed over or near the top of the leacheS. I am enabled to heat the stronger liquors eiectually, without the' disadvantageof discharging and condensing the steam into them. Steam, either direct or exhaust, is admitted at cl' and after passing through the coil or strands otv pipe, passes into the tube or hollow Alog a ate, and 'then passes through the discharge-pipes b b, into the oldest and weakest leaches, where hot water is par ticularly required, or to any other desired place.

There are other dsadvantages'resulting from 'dis-- `charging the steam directly into the leaches. The

jarringvproduced 'thereby is injurious to the vleaches. The leach beinglled with bark and liquor,` will not heat evenly all over alike, but will remain unheated a few feet from the point where the steam is discharged,

thus making it necessary to draw the liquor to the' junk, and topump it back again, to equalizethe temperature throughout the whole of the leach-vat.

Having herein described my invention, its construction and operation, l

What I claim as new, and desire to secure by Letters Patent of the United States, is-V '1. Large tube or hollow log, a, placed over, or near the top of the leach-vats.

2. Discharge-pipes b4 b, with stop-cocks c c, through'.

which the condensed or partially condensed steam is admitted into the desired leach, or their equivalents.

, .3. 4Conveying the condensed or partially condensed steam through the large tube a, and. dischargepipes b l, as herein set forth.

` LEWIS O. ENGLAND.

Witnesses: I

W. W. DOUGAHERTY, l. '13. Travis. 

